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Battle of Iwo Jima

The Battle of Iwo Jima was a major World War II battle fought between the United States and the Empire of Japan from 19 February to 26 March 1945.

By Ethan Anderson| Reviewed by Olivia Bennett, Standards & Fact-Checking Lead| Updated July 27, 2026|2 min read| Fact-checked

The Battle of Iwo Jima was a major World War II battle fought between the United States and the Empire of Japan from 19 February to 26 March 1945. U.S. Marines and other forces captured the island after more than a month of heavy fighting against entrenched Japanese defenders. The battle became one of the bloodiest in Marine Corps history and a lasting symbol of Pacific War combat.

Strategic significance

Iwo Jima was targeted because its airfields and location could support Japanese defence and help U.S. operations against the Japanese home islands. Allied planners also wanted to remove a base used to warn Japan of incoming bomber raids and to provide an emergency landing site for American aircraft.

Battle and tactics

U.S. Marines landed on 19 February 1945 and faced intense resistance from Japanese troops who fought from underground bunkers, tunnels, and caves. The battle became a grinding close-quarters struggle rather than the brief campaign planners had expected.

Casualties and outcome

The battle caused very high losses on both sides, with roughly 28,000 U.S. casualties and about 21,000 Japanese deaths. The island was declared secure on 26 March 1945, making it an important American victory in the Pacific campaign.

Historical legacy

Iwo Jima became one of the most famous battles of the Pacific War and a symbol of sacrifice in U.S. Marine Corps history. It is also widely remembered through wartime photography and later historical writing.

Key facts

  • The invasion began on 19 February 1945 after extensive naval and air bombardment.
  • Japanese forces used caves, tunnels, and fortified positions to prolong the defence.
  • The battle lasted about 36 days and was among the fiercest of the Pacific War.
  • U.S. forces took heavy losses, with casualties exceeding those of the Japanese in many accounts.
  • Iwo Jima was declared secure on 26 March 1945, although some fighting continued afterward.
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Canadian context

The battle is relevant to Canadian readers as part of the broader Allied campaign in the Pacific during the Second World War, which shaped postwar international security and military history.

Frequently asked questions

What was the Battle of Iwo Jima?
It was a World War II amphibious assault in which U.S. forces captured Iwo Jima from Japan after fierce fighting in February and March 1945.
When did the battle take place?
The main battle ran from 19 February to 26 March 1945.
Why was Iwo Jima important?
Its airfields and location made it strategically valuable for both Japanese defence and U.S. operations against Japan.
How many casualties were there?
Common estimates give about 28,000 U.S. casualties, including about 6,800 killed, and about 21,000 Japanese killed, with 216 captured.
Who won the battle?
The United States won and declared the island secure on 26 March 1945.
Is Iwo Jima still under Japanese control?
Yes. The island was returned to Japanese control in 1968 after postwar U.S. administration.

References

  1. National WWII Museumhttps://www.nationalww2museum.org/war/topics/battle-iwo-jima
    Supports: Battle dates, strategic purpose, battle duration, casualties, and island secured date
  2. Naval History and Heritage Commandhttps://www.history.navy.mil/browse-by-topic/wars-conflicts-and-operations/world-war-ii/1945/battle-of-iwo-jima.html
    Supports: Battle dates and secure date
  3. Encyclopaedia Britannicahttps://www.britannica.com/event/Battle-of-Iwo-Jima
    Supports: Battle dates, conflict, participants, location, and casualty estimates
  4. U.S. Department of Warhttps://www.war.gov/News/Feature-Stories/Story/article/4069599/battle-of-iwo-jima-80-years-later-lessons-learned/
    Supports: Battle dates, continued sporadic fighting, and return of Iwo Jima to Japan in 1968
  5. Encyclopaedia Britannicahttps://www.britannica.com/place/Iwo-Jima-island-Japan
    Supports: Island location, administrative status, name, and return to Japan in 1968